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V4L/DVB (10167): sms1xxx: add support for inverted gpio

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negative gpio values signify inverted polarity

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Michael Krufky 2008-11-28 01:02:56 -03:00 committed by Mauro Carvalho Chehab
parent e4cda3e072
commit dd72f31b4f
1 changed files with 13 additions and 4 deletions
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17
drivers/media/dvb/siano/sms-cards.c
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@ -131,9 +131,10 @@ struct sms_board *sms_get_board(int id)
return &sms_boards[id]; return &sms_boards[id];
} }
static int sms_set_gpio(struct smscore_device_t *coredev, u32 pin, int enable) static int sms_set_gpio(struct smscore_device_t *coredev, int pin, int enable)
{ {
int ret; int lvl, ret;
u32 gpio;
struct smscore_gpio_config gpioconfig = { struct smscore_gpio_config gpioconfig = {
.direction = SMS_GPIO_DIRECTION_OUTPUT, .direction = SMS_GPIO_DIRECTION_OUTPUT,
.pullupdown = SMS_GPIO_PULLUPDOWN_NONE, .pullupdown = SMS_GPIO_PULLUPDOWN_NONE,
@ -145,12 +146,20 @@ static int sms_set_gpio(struct smscore_device_t *coredev, u32 pin, int enable)
if (pin == 0) if (pin == 0)
return -EINVAL; return -EINVAL;
ret = smscore_configure_gpio(coredev, pin, &gpioconfig); if (pin < 0) {
/* inverted gpio */
gpio = pin * -1;
lvl = enable ? 0 : 1;
} else {
gpio = pin;
lvl = enable ? 1 : 0;
}
ret = smscore_configure_gpio(coredev, gpio, &gpioconfig);
if (ret < 0) if (ret < 0)
return ret; return ret;
return smscore_set_gpio(coredev, pin, enable); return smscore_set_gpio(coredev, gpio, lvl);
} }
int sms_board_setup(struct smscore_device_t *coredev) int sms_board_setup(struct smscore_device_t *coredev)